EP0000250A1 - Entwässerungsleiste für eine Blattbildungsmaschine. - Google Patents

Entwässerungsleiste für eine Blattbildungsmaschine. Download PDF

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Publication number
EP0000250A1
EP0000250A1 EP78300042A EP78300042A EP0000250A1 EP 0000250 A1 EP0000250 A1 EP 0000250A1 EP 78300042 A EP78300042 A EP 78300042A EP 78300042 A EP78300042 A EP 78300042A EP 0000250 A1 EP0000250 A1 EP 0000250A1
Authority
EP
European Patent Office
Prior art keywords
foil
nose
detachable
nose portion
drainage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP78300042A
Other languages
English (en)
French (fr)
Inventor
Thomas Neil Cook
James Hardman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
C H JOHNSON and SONS Ltd
C H Johnson & Sons Ltd
Johnson & Sons Ltd C H
Original Assignee
C H JOHNSON and SONS Ltd
C H Johnson & Sons Ltd
Johnson & Sons Ltd C H
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB2491877A external-priority patent/GB1588753A/en
Application filed by C H JOHNSON and SONS Ltd, C H Johnson & Sons Ltd, Johnson & Sons Ltd C H filed Critical C H JOHNSON and SONS Ltd
Publication of EP0000250A1 publication Critical patent/EP0000250A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/48—Suction apparatus
    • D21F1/483—Drainage foils and bars

Definitions

  • This invention relates to web forming machines such as paper making machines and more particularly drainage foils such as are located below a metal or plastic fourdrinier wire in a paper making machine.
  • Drainage foils are well known devices employed in paper making machines.
  • a drainage foil typically comprises an elongate body located below a forming fabric in a paper making machine transverse to the direction of movement of the fabric.
  • the upper surface of the foil adjacent to the leading edge thereof is arranged to contact the forming fabric. Behind or downstream of that contact area the'upper surface of the foil may be inclined downwardly,
  • foil blades which are made entirely of ceramic or other wear resistant mat- exial. Some of these designs have fixed angle blades which are neither adjustable nor readily removable whilst others involve the mounting of the foils in such a manner that they can be pivoted about a longitudinal axis in order to change the foil ange. When foils of this latter design are adjusted, the position of the leading edge changes relative to the forming wire. Significantly, the width of a full ceramic foil is unalterable.
  • the present invention has been made from a consideration of these problems.
  • a drainage foil comprising wear resistant nose portion adapted to be mounted below a web forming fabric/wire, with the upper surface of the nose portion supporting said fabric and a detachable portion located downstream of the said nose portion, the upper surface of the detachable portion being parallel to, or at least a part thereof being downwardly inclined in the downstream direction to the upper surface of the nose portion.
  • the nose portion i.e. leading support part of the foil is permanently mounted in the paper making machine.
  • the nose portion is, as stated, made of a hard wearing material which may be ceramic, metal or plastics examples of which are aluminium oxide, silicon carbide and silicone nitride, and substrates coated with wear resistant materials such as flame plated tungsten carbide on a stainless steel substrate. Since the nose portion is only handled infrequently it can be made of a brittle material
  • the dettachable portion is-advantageously made of plastics and is preferably slidably mounted in the paper smaking machine. Since it does not contain any ceramic insert it can be handled without risk of damage thereto. If the foil angle and/or blade width or shape is to be changed the detachable portion can be replaced by another which has a different foil angle and/or blade width or shape. Alternatively the detachable portion can be removed entirely and not replaced in which case, it will be noted that the nose portion still provides support for the forming fabric.
  • the upper surface of the detachable portion may form a continuation of the upper surface of the nose portion or there may be a step between the upper surfaces the nose portion and the detachable portion.
  • this invention can be adapted to a variety of equipments in which a wear resistant support surface can be used to advantage in conjunction with an adjacent replaceable component, e.g. vacuum boxes.
  • the drainage foil comprises a hard wearing ceramic nose portion 10 the upper surface of which supports the forming fabric 12 of a paper making machine.
  • the nose portion is mounted on a support 11 and the support is fixed to a part of the machine 15.
  • the nose portion 10 may be fixed to the support by any suitable means such as a dovetail joint, bolts, adhesive or a combination thereof.
  • the support 11 may be made of any material such as metal or plastics.
  • a detachable portion 20 preferably of plastics is located downstream of the nose nortion 10 .
  • the detachable portion is for convenience provided with a T-shaped slot 22 on its underside so that it can be slidably mounted on a T-bar such as is commonly provided in paper making machines.
  • T-bar such as is commonly provided in paper making machines.
  • T-slot 22 a T-shaped bar can be provided which is received in a T-slot suitably located in the paper making machine.
  • Other shapes can be adopted in place of the T-shape for example a dove tail.
  • the detachable portion 20 can be removed from the and, replaced by one of a different angle width or shape.
  • the detachable portion may be removed so that only the wear resistant nose portion remains to support the forming fabric. Such changes are made without any disturbance of the nose portion 10 and whilst the machine is making paper.
  • a projection 17 is provided on the support 11 which is received in a slot 19 in the detachable portion 20.
  • the nose portion may be mounted on the paper making machine in other ways, for example as shown in Figure 5.
  • the lower part 14 of the nose portion is seated in a channel 16 fixed to the paper making machine and held in the channel by a wedge 18.
  • the wedge is secured to the channel 16 by bolts (not shown) or other suitable means.
  • a nose portion and detachable portion can be mounted in a paper making machine.
  • the channel 16 in which the nose portion is mounted can have a T-shaped slot in its under surface so that the channel can also be mounted on a T-bar.
  • the nose portion and detachable portion can be linked together.
  • An example of that arrangement is shown in Figure 6.
  • the nose portion 10 is dovetailed as at 24 into a support 26.
  • the support has a T-shaped slot 28 in its under surface whereby it can be mounted on a T-bar.
  • a flanged lug 30 is provided on the rearward side of the support onto which the detachable portion 20 is mounted.
  • FIG.7 Another embodiment in which the nose and detachable portions are linked is illustrated in Fig.7. That embodiment is similar to Fig. 5 except that the part 16 has a T-shaped bar 32 on which the detachable portion is slidably received.
  • a liquid-tight junction is produced by urging the detachable portion towards the nose portion.
  • the part of the detachable portion that engages the nose 10 or the nose support 11 can be made resiliently deformable for example as shown in Fig.4.
  • the parts are mounted so that the detachable portion is urged against the nose or nose support with deformation of the part 25 thereby ensuring that there is no through gap between the nose or nose support and the detachable portion.
  • the means for urging the detachable portion towards the nose portion ray be mounted on the detachable portion and bear against a part of the foil support or be mounted on the foil support and bear against the detachable portion.
  • the drainage foil comprises a nose portion 10 of hard wearing material such as ceramic and a detachable portion 20 provided on its underside with a T-shaped slot 22.
  • the T-slot 22 and T-bar 40 are dimensioned so as to provide transverse clearance thereby permitting limited movement of portion 20 towards and away from the nose portion 10.
  • a cut out 42 is formed in the side thereof adjacent the nose portion.
  • a leaf spring 44 is mounted inthe cut out, as by a screw 46. The spring is arranged to bear against the portion 20 of the foil so as to urge it against the nose portion 10 and form a liquid tight joint at the junction of the two portions 48.
  • Figure 10 is similar to that of Figures 1 and 2 except that the spring 44 is mounted externally and bears against the rear face of detachable portion 20.
  • Figure 11 illustrates an arrangement in which the spring of the emboidment of Figure 10 is replaced by a roller or disc 50 of resiliently deformable material such as rubber.
  • the roller or disc is mounted on a vertically disposed shaft 52 so as to bear against the rear face of detachable portion 20.
  • a spring loaded ball 54 is located in a bore 56 in the detachable portion 20 so as to act on the front face of the T-bar 40.
  • a hollow deformable tube 60 is located in a channel 62 defined between the detachable portion 20 and the front of the T-bar 40.
  • Figs.14 and 15 the embodiment shown therein comprises a T-bar wherein the top flange defining part 70 is movably mounted on the web part 72 by means of bolts 74 extending through angled slots 76, in part 70 into part 72. Longitudinal movement of part 70 causes lateral movement thereof whereby the detachable portion 20 can be urged towards the nose portion 10.
  • the nose portion 10 may for convenience be made up from a plurality of sections across the width of the paper making machine.
  • the T-shaped slot is provided with a shallow recess in the upper surface thereof so as to reduce the area of contact between the part 20 and the T-bar. This assists mounting, and removal; if part 20 on the T-bar.

Landscapes

  • Paper (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
EP78300042A 1977-06-15 1978-06-14 Entwässerungsleiste für eine Blattbildungsmaschine. Withdrawn EP0000250A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB2491877 1977-06-15
GB2491877A GB1588753A (en) 1977-06-15 1977-06-15 Web forming machines
GB1239078 1978-03-30
GB1239078 1978-03-30

Publications (1)

Publication Number Publication Date
EP0000250A1 true EP0000250A1 (de) 1979-01-10

Family

ID=26248995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78300042A Withdrawn EP0000250A1 (de) 1977-06-15 1978-06-14 Entwässerungsleiste für eine Blattbildungsmaschine.

Country Status (9)

Country Link
EP (1) EP0000250A1 (de)
JP (1) JPS5438906A (de)
CA (1) CA1077318A (de)
DE (1) DE2857151A1 (de)
FI (1) FI781892A (de)
FR (1) FR2434236A1 (de)
IT (1) IT1096737B (de)
NL (1) NL7815007A (de)
SE (1) SE7906541L (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1012381A1 (de) * 1997-07-31 2000-06-28 Thermo Fibertek Inc. Steuerung der papierbildungsaktivität durch trägheitsanregungsblätter mit variablem winkel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE437681B (sv) * 1982-10-13 1985-03-11 Inventing Ab Schaber eller rakel for kontrollerbar paforing och utjemning av bestrykningsmedel pa en lopande pappersbana

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337394A (en) * 1964-05-15 1967-08-22 Johnson Wire Works Ltd Foil type drainage apparatus for paper making machines
GB1291332A (en) * 1969-11-22 1972-10-04 Voith Gmbh J M Stationary support for supporting a moving band such as a wire of a paper-making machine
CH545375A (de) * 1972-12-11 1973-12-15 Escher Wyss Gmbh Saugleiste einer Papiermaschine
US3870597A (en) * 1972-05-24 1975-03-11 Beloit Corp Drainage foil having a foil blade insert

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3337394A (en) * 1964-05-15 1967-08-22 Johnson Wire Works Ltd Foil type drainage apparatus for paper making machines
GB1291332A (en) * 1969-11-22 1972-10-04 Voith Gmbh J M Stationary support for supporting a moving band such as a wire of a paper-making machine
US3870597A (en) * 1972-05-24 1975-03-11 Beloit Corp Drainage foil having a foil blade insert
CH545375A (de) * 1972-12-11 1973-12-15 Escher Wyss Gmbh Saugleiste einer Papiermaschine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1012381A1 (de) * 1997-07-31 2000-06-28 Thermo Fibertek Inc. Steuerung der papierbildungsaktivität durch trägheitsanregungsblätter mit variablem winkel
EP1012381A4 (de) * 1997-07-31 2004-05-12 Thermo Fibertek Inc Steuerung der papierbildungsaktivität durch trägheitsanregungsblätter mit variablem winkel

Also Published As

Publication number Publication date
JPS5438906A (en) 1979-03-24
IT1096737B (it) 1985-08-26
FI781892A (fi) 1978-12-16
DE2857151A1 (de) 1980-02-21
IT7824563A0 (it) 1978-06-14
FR2434236A1 (fr) 1980-03-21
NL7815007A (nl) 1979-09-28
SE7906541L (sv) 1979-08-02
CA1077318A (en) 1980-05-13

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE CH DE FR LU NL SE

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn
32 Conversion
RIN1 Information on inventor provided before grant (corrected)

Inventor name: COOK, THOMAS NEIL

Inventor name: HARDMAN, JAMES